Added IssueComments + ForeignKeys + Indexes

app/models/issue.rb

@@ -1,8 +1,10 @@
 class Issue < ActiveRecord::Base
 	belongs_to :reportable, :polymorphic => true
 	has_many :reports
+	has_many :comments, :class_name => "IssueComment"
 	validates :reportable_id, :uniqueness => { :scope => [ :reportable_type ] }
 	belongs_to :user
+	validates :user_id, :presence => true
 
 	# Check if more statuses are needed
 	enum status: %w( open ignored resolved )

app/models/issue_comment.rb

@@ -0,0 +1,6 @@
+class IssueComment < ActiveRecord::Base
+	belongs_to :issue
+	belongs_to :user
+
+	validates :body, :presence => true
+end

app/models/user.rb

@@ -27,6 +27,8 @@ class User < ActiveRecord::Base
   has_many :roles, :class_name => "UserRole"
 
   has_many :issues
+  has_many :issue_comments
+  
   has_many :reports
 
   scope :visible, -> { where(:status => %w(pending active confirmed)) }